OS Description :
iOS (previously iPhone OS) is a mobile operating system developed and distributed by Apple Inc. Originally released in 2007 for the iPhone and iPod Touch, it has been extended to support other Apple devices such as the iPad and Apple TV. Unlike Microsoft’s Windows Phone (Windows CE) and Google’s Android, Apple does not license iOS for installation on non-Apple hardware. As of September 12, 2012,Apple’s App Store contained more than 700,000 iOS applications, which have collectively been downloaded more than 30 billion times.It had a 21% share of the smartphone mobile operating system units shipped in the fourth quarter of 2012, behind only Google’s Android.